package com.alex.threads;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class CallableThreadTest implements Callable<Integer> {
    public static void main(String[] args)
    {
        CallableThreadTest ctt = new CallableThreadTest();
        FutureTask<Integer> ft = new FutureTask<Integer>(ctt);
        for(int i = 0;i < 100;i++)
        {
//            System.out.println(Thread.currentThread()+" "+Thread.currentThread().getName()+" 的循环变量i的值"+i);
            if(i==20)
            {
                new Thread(ft,"有返回值的线程").start();
            }
        }
//        try
//        {
//            System.out.println("子线程的返回值："+ft.get());
//        } catch (InterruptedException e)
//        {
//            e.printStackTrace();
//        } catch (ExecutionException e)
//        {
//            e.printStackTrace();
//        }

    }
    @Override
    public Integer call() throws Exception
    {
        int i = 0;
        for(;i<100;i++)
        {
            System.out.println(Thread.currentThread() +" "+Thread.currentThread().getName()+" "+i);
        }
        return i;
    }
}
